What is the integral of x^3+cos(x) ?

The integral of x^3+cos(x) is (x^4)/4+sin(x)+C

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integral of x^3+cos(x)

\int x^{3} + cos (x) d x

\frac{x ^{4}}{4} + sin (x) + C

Solution steps

\int x^{3} + cos (x) d x

Apply the Sum Rule:

\int f (x) \pm g (x) d x = \int f (x) d x \pm \int g (x) d x

= \int x^{3} d x + \int cos (x) d x

\int x^{3} d x = \frac{x ^{4}}{4}

\int cos (x) d x = sin (x)

= \frac{x ^{4}}{4} + sin (x)

Add a constant to the solution

= \frac{x ^{4}}{4} + sin (x) + C

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What is the integral of x^3+cos(x) ?
The integral of x^3+cos(x) is (x^4)/4+sin(x)+C